Fabrication and Properties of the Building Ceramic Slab Reinforced by Al2O3 Platelet
NIE Guanglin1,2,*, LIU Yijun1,*, WANG Qinggang1, CHENG Kemu1, WU Yang1, HUANG Lingyan1, PAN Limin1, BAO Yiwang3, RAO Pinggen2
1 Postdoctoral Research Center, Monalisa Group Co., Ltd., Foshan 528211, Guangdong, China 2 School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China 3 State Key Laboratory of Green Building Materials, China Building Materials Academy, Beijing 100024, China
Abstract: The Al2O3 platelet was used as the 2D reinforcement to improve the mechanical properties of building ceramic slabs. The effects of particle size and mixing amount of Al2O3 platelet on relative density, mechanical properties, phase compositions and microstructure of building ceramic were explored, and the strengthening-toughening mechanisms of the Al2O3 platelet were elucidated in this work. The results show that the water absorption and apparent porosity of the building ceramic were increased, and its relative density was decreased gradually with the increasing mixing amount of Al2O3 platelet. The inhibition of Al2O3 platelet on the densification of building ceramic can be weakened by reducing the particle size of Al2O3 platelet, resulting in a more excellent strengthening-toughening result of the Al2O3 platelet with a particle size of 5 μm compared with that of the Al2O3 platelet with a particle size of 10 μm. The flexural strength and fracture energy of the building ceramic prepared by the addition of 5wt% of the Al2O3 platelet with a particle size of 5 μm can be up to (71.6±5.5) MPa and (296.2±45.3) J/m2, which are 25.2% and 46.5% higher than those of the blank sample prepared without Al2O3 platelet. The crystal phase and flaky structure of Al2O3 platelet can be remained in the building ceramic matrix after the sintering process, and the interfacial bonding between the Al2O3 platelet and ceramic matrix is well; furthermore, the mechanical properties of building ceramic can be effectively improved by using the multiple combination of strengthening mechanisms (composite strengthening, crack pinning, dispersion strengthening and prestress reinforcement) of the Al2O3 platelet. The proposed strengthening-toughening technology via Al2O3 platelet is an effective method to improve the service safety and reliability of building ceramic slab, and also is conductive to promoting the fabrication of ultrathin building ceramic slabs.
聂光临, 刘一军, 汪庆刚, 程科木, 吴洋, 黄玲艳, 潘利敏, 包亦望, 饶平根. 片状Al2O3增强建筑陶瓷板材的制备与性能研究[J]. 材料导报, 2023, 37(16): 22020046-7.
NIE Guanglin, LIU Yijun, WANG Qinggang, CHENG Kemu, WU Yang, HUANG Lingyan, PAN Limin, BAO Yiwang, RAO Pinggen. Fabrication and Properties of the Building Ceramic Slab Reinforced by Al2O3 Platelet. Materials Reports, 2023, 37(16): 22020046-7.
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2023, Vol. 37 
